C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Cruise Control Adjustment

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Old Apr 12, 2017 | 05:28 PM
  #1  
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mlm0
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From: Georgetown TX
Default Cruise Control Adjustment

1989 auto

trying to get my cruise control adjusted correctly. It works, but one drop in mph causes it to come on, but it comes on too harsh. On and Off. Very uncomfortable

whats the the best way to adjust it. Should the cable be loose or tight where it connects to throttle body. Maybe something else wrong?

all the trouble shooting areas only talk about if it's not working at all

i thinking maybe it's not holding vacuum which would cause it not to hold speed steady, and would cause it to get on and off so rapidly

Last edited by mlm0; Apr 12, 2017 at 06:34 PM.
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Old Apr 12, 2017 | 07:22 PM
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The adjustment is very basic, it's just take the slack out and leave it with just a little bit of droop in the chain .

​​​​​​​ you mentioned may not be holding Vaccumm the large hose should be fully blocked unless the brake pedal is pressed, the smaller one should have a good vacuum. Give the hoses a good look at I have seen the hoses get leaky from rubbing on the battery or rotted from battery acid
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